Avant market leading Vertical Slider combines all the benefits of high performing modern material and functionality with period character and design. Widely recognised as one of the best PVC-U alternatives to traditional timber box sashes our Vertical Sliders combine modern standards of thermal performance and security with an authentic appearance. Approved by planning officers even for use in conservation areas these windows are feature packed.


  • Fully featured Ovolo detail
  • Deep bottom rail option gives the authenticity of a timber box sash
  • Large and small sash options for equal sight lines
  • Tilt ‘inwards’ facility allows easy cleaning of the outside pane from inside
  • Optional Georgian bars and moulded or through sash horns
  • 128mm front to back dimensions
  • Maximum dimensions: width 1600mm, height 3000mm
  • Mechanically jointed deep bottom rail for authentic appearance.
  • Range of cills
  • Low-line PCE glazing system
  • Pile-sealed sash edges and outer frame
  • Trickle or glazed in vents
  • Full range of colours and woodgrain foil finishes
  • Band ‘A’ WER with 24mm sealed double glazed units
  • Kitemarked to BS EN 12608 and PAS 24


  • A 128mm outerframe matches timber sash dimensions, making installation simple
  • Windows can be made up to a maximum size of 1600mm wide and 3000mm high
  • Large and small sash profiles give equal sightlines to the top and bottom sashes
  • 150mm and 210mm cills
  • 10mm/20mm/50mm frame packers.


  • Authentic ovolo shape to the frame, bead, sash and cill
  • Optional Georgian bars, sash horns, weather bars and a deep bottom rail designed specifically to provide that period look
  • Flush gaskets mimic traditional glazing
  • Approved by many planning boards, even for use in conservation areas.


  • Designed to achieve a Window Energy Rating of Band ‘A’ with 24mm sealed units
  • Draughts prevented with pile seals to the sash and outerframe.


  • Both sliding sashes can tilt inwards for easy cleaning
  • Smooth operating balance mechanisms.